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TechnologyLoad and energy management

the chargers get what the building leaves

The VOOL load management controller sits at the grid connection, measures it ten times a second and gives the chargers exactly the power the building does not need. Above it, an EMS adds batteries, solar and market prices.

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measurement cycle
100 ms
measurement cycle
chargers per LMC
64
chargers per LMC
per space proved enough (50 spaces)
8 A
per space proved enough (50 spaces)
VOOL LMC, up to 64 chargers per controller, cascadable

VOOL LMC

up to 64 chargers per controller, cascadable

The VOOL load management controller (LMC) sits in the main cabinet; current clamps measure the incoming phases.

Four levels

What the controller decides

  1. 01

    Building-level load management

    The whole connection measured every 100 ms; chargers get what the building leaves.

  2. 02

    Patented phase switching

    Each charger on the phase with the most headroom: the full connection is usable.

  3. 03

    Source of energy

    Grid at market price, battery or solar, whichever is best now.

  4. 04

    Priorities

    Per user, per charger, per group and per time: fleet first, visitors last.

The VOOL load management controller (LMC) and platform, operated by AMP X VOLT.

Measured every 100 ms

A day on one 500 A connection

0100200300400500A500 A connection09:0012:0015:0018:0021:0000:0003:0006:0009:00BuildingCharge nowCheapest energyEnergy price (ct/kWh)TIME09:00Building150 ACharge now0 ACheapest energy0 AEnergy price12 ct/kWhcars plugged in2 / 20 · 0 charging
09:00

12:00

Daytime: most cars are away

In a typical residence 80% of the cars leave in the morning and return in the evening. The car that stays home is topped up when daytime prices are lowest.

  1. 12:00: Daytime: most cars are away. In a typical residence 80% of the cars leave in the morning and return in the evening. The car that stays home is topped up when daytime prices are lowest.
  2. 18:00: Every car plugs in on arrival. Between 17:00 and 20:00 most cars come home. Every space has its own charger, so nobody waits for a free one and nobody moves cars around at night.
  3. 19:30: Evening peak: building 400 A, chargers 100 A. The building takes 400 A of the 500 A connection. Only the cars set to Charge now draw the remaining 100 A, with priority and at the hour's market price. Nothing trips.
  4. 20:30: One tap moves charging to the night. The driver in bay 5 switches from Charge now to Cheapest energy with a ready-by time of 07:25. The car stops paying peak prices and finishes at night.
  5. 03:00: Night: building 100 A, chargers 400 A. The building is quiet and prices fall. The cars set to Cheapest energy charge in the cheapest hours, at full power.
  6. 07:00: Every car ready on time. Every plugged-in car has reached its target before its own departure time, whichever mode the driver chose, all on one 500 A connection.

Scaling

One logic from a villa to a campus

Multi-point

One grid connection, several cabinets: an LMC at every measuring point (blocks of a residence, car park levels, AC and DC areas), all on one platform view.

Multi-level

Controllers cascade: every level respects the limit of the level above, from the grid connection to a floor, a group of chargers and a single phase.

Works offline

Control runs locally in the LMC; if the internet drops, charging continues within the limits. Link to the chargers by CAN cable, LAN or Wi-Fi.

Up to 64 chargers per LMC; add a controller, not a grid connection. In a 50-space car park, an average of 8 A per space proved enough. Other OCPP chargers can be managed through the VOOL back-end.

Energy management

When a battery and solar join

For DC charging and industrial sites a WattsFuture EMS sits above the chargers: it adds the battery, the solar plant, day-ahead prices and balancing markets to the decision.

100 kW800 kW1,000 kW300 kW1,600 kWEMSGridfrom the gridSolar PVBatterydischargingBuildingDC chargersAC chargers (VOOL)Energy price≈ €170/MWhGrid frequency50.00 Hz
1/3

Peak price

The peak is covered by the battery

At a peak price of about €170/MWh, solar and the battery cover a 1.6 MW truck session. Grid import drops to about 100 kW.

  1. Peak price: The peak is covered by the battery. At a peak price of about €170/MWh, solar and the battery cover a 1.6 MW truck session. Grid import drops to about 100 kW.
  2. Grid support: Grid support in seconds. The grid frequency dips to 49.87 Hz and the battery discharges over 1 MW within seconds. The EMS can offer this response on balancing markets.
  3. Solar surplus: Solar used on site, by priority. 1.6 MW of solar: the building first, then 1 MW to the DC chargers, the rest to AC charging with VOOL load management. Nothing is wasted.

Ask your AI assistant

Load management questions

“What is dynamic load management for EV chargers?”

A controller measures the whole connection in real time and gives the chargers what the building does not use, so the connection limit is never crossed. The VOOL LMC does this every 100 ms, per phase, with patented phase switching and priorities.

“What happens if the internet connection fails?”

The VOOL LMC controls the chargers locally over CAN cable, LAN or Wi-Fi, so dynamic load management continues without internet; billing data syncs when the link returns.

“Can EV charging follow solar production?”

Yes. The controller and EMS take solar production into account, so charging rises when the panels produce and falls back to cheap grid hours or the battery when they do not.

Send us the connection and the load

A main-cabinet photo and a year of consumption are enough to show what the controller frees up.

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